Goal:

Allow to configure more than one ovn-controller, each belongs to a different AZs to be deployed on the OCP nodes (in the POD).

Currently ovn-operator's API (CRD) allows to specify `OvnAvailabilityZones` as list of AZs and that list is then set in the `external-ids:availability-zones` for each of the ovn-controller PODs. But in some cases it may be required to deploy ovn-controller on the nodes which belongs to different AZs so something like list of the ovn-controllers should be specified, and each of the elements on that list would have different `nodeSelectors` and `OvnAvailabilityZones` specified.

Open questions:

This came up to me during the call about setting deployment for one of the customers but finally that customer will not need this change as they will deploy ovn-controllers in the edpm networker nodes. So the open question is if we will really have customers who would require this change.